Question

The minimum velocity v0, such that an electron projected as shown in the figure passes between the plates without touching them (Take mass of electron as m and charge e. E is electric field between the plates) is

Answer 1

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Answer 2

ELECTROSTATICS

An electron (charge = e, mass = m) is projected horizontally into a uniform electric field produced between two oppositely charged parallel plates, as shown in figure. The charge density on both plates is

and separation between them is d. You have to assume that only electric force acts on the electron and there is no field outside the plates. Initial velocity of the electron is u, parallel to the plates along the line bisecting the gap between the plates. Length of plates is 2L and there is a screen perpendicular to them at a distance L. (i) Find s if the electron hits the screen at a point that is at same height as the upper plate. <br> (ii) Final the angt/physics_images/IJA_PHY_V02_C06_E01_066_Q01.png" width="80%"